Residents in the town of Yountville are under mandatory orders to boil their water for the second time in less than four months after E. coli was detected in the municipal water supply.

Friday’s order comes on the heels of a precautionary order that was issued for three days in July.

The most recent order came after samples from a treatment plant at the Veterans Home of California tested positive for E. coli earlier Friday. The treatment plant handles water that comes from Rector Reservoir, Yountville’s primary water source located east of Silverado Trail, town officials said.

YouTube video
(Centers for Disease Control/YouTube)

All 838 water customers of the town are affected by the problem, which Yountville officials anticipated resolving by Tuesday.

Residents are being told to boil water for a minute and let it cool before drinking, and should use boiled or bottled water for drinking, brushing teeth and food preparation while the order is in effect.

The Centers for Disease Control and Prevention provides more information on what to do when a boil water advisory is in effect.

Dan McMenamin is the managing editor at Pagransen, directing daily news coverage of the 12-county greater Bay Area. He has worked for BCN since 2008 and has been managing editor since 2014 after previously serving as BCN’s San Francisco bureau reporter. A UC Davis graduate, he came to BCN after working for a newspaper and nonprofit in the Davis area. He handles staffing, including coaching of our interns, day-to-day coverage decisions and management of the newswire.